In order to simulate human tactile sensation and realize intelligent tactile sensation, a multi-information tactile detection system based on polyvinylidene fluoride (PVDF) piezoelectric film was developed, which initially realized the detection and recognition of the five dimensional information of the surface softness, viscosity, texture roughness, texture regularity and heat of an object. The tactile signal detection system uses a bump-type piezoelectric thin film sensor to obtain object surface information, and the host computer performs digital filtering, feature extraction, and feature classification on the sampled signal, and finally obtains the surface characteristic information of the object, and draws a five-sensing map of the surface characteristics of the object. Among them, the texture roughness adopts the main frequency recognition method, and uses the Fourier transform (FFT) to perform feature extraction. The experimental results show that the system can effectively distinguish the surface information of the measured object.