The tourmaline pyroelectric coefficient measuring device is characterized by consisting of a temperature control device and a current detection output device, wherein the current detection output device mainly consists of a digital contact thermometer, a sensitive multimeter with a digital meter head, a current integrated operational amplifier circuit and an electrode (2); The two electrodes (2) are respectively connected with a current integrated operational amplifier circuit through wires, and the output end of the current integrated operational amplifier circuit is connected with a sensitive multimeter with a digital meter; Two end faces of the tourmaline sample (3) are in contact with two electrodes (2), and a digital contact thermometer is in contact with the tourmaline sample (3) through a sensing line; The tourmaline sample (3) is heated to 130- 170℃ in a temperature control device, and then taken out for air cooling. It can measure the pyroelectric coefficient of tourmaline with very small pyroelectric current.