Waste gas purification treatment device and diesel generator set

The invention relates to a waste gas purification treatment device. The waste gas purification treatment device comprises an ECU control unit and a purification shell, wherein a waste gas inlet is arranged in the front end of the purification shell; a first accommodating cavity, a second accommodating cavity, a third accommodating cavity and a fourth accommodating cavity are arranged in the purification shell; the waste gas inlet communicates with the first accommodating cavity; a main intake baffle is installed at the junction of the first accommodating cavity and the second accommodating cavity; a secondary intake baffle is installed at the junction of the first accommodating cavity and the third accommodating cavity; a filter element for carrying out purification treatment on waste gas particles is installed between the second accommodating cavity and the third accommodating cavity; a main exhaust baffle is installed at the junction of the second accommodating cavity and the fourth accommodating cavity; an