The invention relates to a detection apparatus for a pressure inside a
plant body. The detection apparatus comprises a measuring unit, a one-
chip microcomputer, a DC-CD power converter, a
USB interface and a computer, wherein the above-mentioned parts are successively connected. The
USB interface unit includes a
USB interface and a USB interface conversion circuit, wherein the USB interface and the USB interface conversion circuit are successively in bidirectional
data connection; the USB interface and the computer are in bidirectional connection; and the USB interface respectively transmits a power supply provided by the computer to each part in the measuring unit and the one-
chip microcomputer by the DC-CD power converter. The measuring unit detects a
signal and transmits the
signal to the one-
chip microcomputer; and the one-chip microcomputer and the USB interface conversion circuit in the USB interface unit are in bidirectional
data connection. According to the above-mentioned technical scheme provided in the invention, the detection apparatus for a pressure inside a
plant body has advantages of simple structure, low cost and convenient usage; various information including an
internal pressure of a
plant, a temperature of the plant itself, an
environmental temperature, an
environmental humidity, and
illuminance and the like can be detected conveniently and effectively.