The invention provides a pump body and a compressor provided with the same. The pump body comprises an air cylinder, a flange, a main shaft, a sliding sheet and a pressure relief channel; the air cylinder is provided with an accommodating cavity; the flange is arranged at the end of the air cylinder for blocking an opening of the accommodating cavity; the main shaft is rotatably arranged in the accommodating cavity in a penetrating mode; the sliding sheet is slidably arranged and can partition the region between the air cylinder and the flange into an air exhaust cavity and a suction and compressing cavity, and the suction and compressing cavity is used for air sucking and/or compressing; the pressure relief channel is formed in the air cylinder and/or the flange, an inlet of the pressurerelief channel communicates with the air exhaust cavity, an outlet of the pressure relief channel communicates with the suction and compressing cavity, so that the part of fluid in the air exhaust cavity is exhausted to the suction and compressing cavity. Through the pump body provided by the invention, the situation that the sliding sheet in the pump body impacts the air cylinder or the main shaft can be avoided.