Phthalocyanine molecular fragments were synthesized in template-based method using methyphenol,4-nitro phthalonitrile as raw materials and N,N dimethyl formamide as solvent under the catalysis of potassium in nitrogen atmosphere.Its molecular weight was confirmed to be 243(theoretical value is 243.34) through mass spectrography.Then through the altogether-dissolve,under the action of pentanol and DBU,molecular fragments and palladium bichloride were synthesized to form the atrovirens 4-methoxy benzoic PdPc.The measured value of absorption peak by infrared absorption spectroscopy was fundamentally uniform to the theoretical value,so that the synthetic reaction end product was determined.Further,PdPc and H₂PtCl₆ was dissolved in carbinol in a given proportion to synthesize for 48 h to form organic semiconductor sensitive material.According to Ohm's law and using laser micro-machining and semiconductor techniques,a porous electrode flat structure was fabricated in the electrodes' area increased while the space reduced,its resistance reduces more than 10³ times than interdigital electrode in common use,in approach to abio-semiconductor's conductivity.Experimental results show it is good for subsequent circuit signal's collection.Through electron scan,its mirco-appearance was observed to be continuous and porous.The air hole was φ0.1～φ2μm,this not only ensure its conduction but also has ventilate characteristic.Through vacuum deposition,the sensitive material was made to be a sensitive film.Under electron scan,the film's fundamental thickness was 2 μm and has φ0.1～φ5μm micro-ball crystal embed,uniform distributed,appeared continual mutual fuse growth.Using a static state method to measure its sensitive characteristic,the measurement indicates that the sensor appears N type semiconductor to NO₂,the sensitivity is 7.45 times when the gas density is 0.010%;the sensor appears P type semiconductor to NO,the sensitivity is 0.25 times when the gas density is 0.010%;the response time is 90s.The change rule to different gases indicates its gas sensitive principle is related to the gas capability.