The invention discloses a portable respiratory muscle electric collecting device which comprises an auscultation device stuck at the chest or the back on the surface of human body, and a processing device, wherein the auscultation device comprises an active respiratory muscle electrode, an amplifier, a filter, an analog-to-digital conversion module, a wireless transmitting module and a first power supply circuit; the processing device comprises a wireless receiving module, an electrocardio-signal interface, a self-adaptive electrocardio-filtering module, a storage module, a network communication module and a second power supply circuit. The portable respiratory muscle electric collecting device is strong in functions of the circuits, low in power consumption, high in reliability and convenient to carry, and has the functions of respiratory muscle electrical signal acquisition, data storage, electrocardio-filtering and network remote monitoring.