The invention relates to a non-contact type pressure testing device for testing pressure of tank bodies for holding samples. The device comprises a reflector panel and a light beam transmitting and receiving assembly, wherein the reflector panel is provided with a surface capable of reflecting light; the light beam transmitting and receiving assembly is arranged opposite to the reflector panel. The invention furthermore provides chemical digesting equipment which comprises a plurality of tank bodies, one or a plurality of pressure testing devices and a driving device, wherein the driving device is connected with the pressure testing devices or the tank bodies to drive the pressure testing devices and the tank bodies to generate relative movement, and then each pressure testing device can continuously test the pressure of each tank body. The invention has the advantages that the pressure testing devices are not in contact with the tank bodies in the pressure testing process and are in a non-contact pressure testing mode; and the chemical digesting equipment tests the pressure of all the tank bodies without obviously enhancing the manufacture cost of the equipment.