In this work, rapid sythesis strategy of Er∶YAP crystals with different doping concentrations were developed using a reverse laser-heated pedestal grwoth (LHPG) method. High quality Er∶YAP single crystal fibers of 0.8 mm×65 mm were obtained using LHPG process by optimizing growth parameters to inhibit defects such as s color centers, cracking, and diameter fluctuations during the growth process. Spectroscopic characterization of Er∶YAP crystals indicates that there is a strong energy transfer process between Er3+ when the doping concentration reaches 5% (atomic fraction), which is favorable for generating high-efficient mid-infrared lasers.