Under the frame of the Third National Survey and Collection Action on Crop Germplasm Resources, the Chongqing Project Group collected 56 pea germplasm accessions from 19 counties of Chongqing from 2015 to 2017. These accessions were found at wide geographic regions with different altitude. We investigated fourteen agronomic traits that were subjected for genetic diversity analysis. The abundant genetic diversity at the agronomic traits was observed, including the qualitative trait pod shape and the quantitative trait plant height with the highest diversity index, as well as the branching number that is with the highest coefficient variation (CV). These accessions were divided into 5 groups by clustering analysis: (1) the accessions with erect or early-mature; (2) the accessions with elite grain edible; (3) the accessions with edible leaf and edible pod; (4) the accessions with high-yield potential and medium-size grain; (5) the accessions with large gain and pod edible. Thus, these pea accessions represented phenotypic variations on pod-eating, leaf-eating and grain characteristics, and this germplasm resource might be valuable in breeding for new pea varieties in Chongqing.